Controlling mechanism for adding-machines.



' No. 858,634. I v PATENTED JULY 2, 1907. JJA. SMITH. I CONTROLLING MECHANISM FOR ADDING MACHINES. 7

APPLICATION FILED D30. 29, 1906.

5 SHEETS-SHEET 1Q q/vilineooeo iltfoznu PATENTED JULY 2, 1907.

J. 1A. SMITH; v CONTROLLING MECHANISM FOR ADDING MACHINES.

APP-LIUATION FILED D30. 29, 1906.

- 5 SHEETSSHEET 2.

. S ut/ Shh-Jana;

PATENTED JULY 2, 1907.

v J. A. SMITH. CONTROLLING MECHANISM FOR YADDING' MACHINES.

APPLICATION FILED DEC. 29, 1906.

5 SHEETS-SHEET a mvamtoz PATENTED JULY 2, 1907.

J. A. SMITH. CONTROLLING MECHANISM FOR ADDING MACHINES.

APPLICATION FILED DBO. 29, 1906. y I

' 5 SHEETS-SHEET 4.

' PATENTED JULY 2.1 901.

' J. A. SMITH. CONTROLLING MECHANISM FOR ADDING MACHINES.

APPLIUATIION FILED DEG. 29,1906.

5 SHEETSSKEET 5.

i wemt oz Strum UNITED STATE$ PATENT or moE.

JOHN A. SMITH, or HARRISBURG, PENNSYLVANIA, ASSIGN on o ELLIOTT-FISHER COMPANY, 4 p or NEW YORK, A CORPORATION or DELAWARE;

I CONTROLLING MECHANISM FOR ADDING-MACHINES To all whom it may concern:

Be it known that 1,,JOHN A. SMITH, a citizen of the United States, residing at Harrisburg, in the county of Dauphin andState of Pennsylvania, have invented a new and useful Controlling Mechanism for Adding-Machines, of which the following is a specification.

pressed to print digits, efiect the operation of a com-- puting device'through the medium of suitable intermediate connections, which cause the numerical values to be accumulated in the computing device as they are printed on the worksheet. It has been proposed to provide means whereby, when digits are being printed outsideof the column to be computed, thekeys willbe relieved of the burden of the operating connections-for column to be computed, by the movement of the typewriter carriage.

The object of my invention is to carry this proposal into effect by equipping the machine with simple, durable, and eflicient mechanism which will automatically connect the keys with the computing device connections whenever the printing point of the typewriter is presented opposite the column to be computed, regardless of the particular location of such column, and which will automatically disconnect the keys from the operating connec tions whcnevcr the n ovementoi the typewriter carriage presents-the printing point of theinachine beyond either side of the column.

A further object of the invention is to provide means whereby the controlling mechanism above specified may be thrown into or out of operative position so that the computing device may be brought into action at a predetermined point in the carriage movement by the automatic operation of the controlling mechanism. or

may remain out of action during the entire carriage movement. as for instance, when it is desired to have the typewrit-ing mechanism wholly independent of the computing device. The latter provision is particularly advantageous for letter writing or other work notrequiring addition. I It also enables the operator to write or print entirely across the lower portion of the sheet independently of the adding mechanism, after adding a short column of numbers printed on the upper portion of the sheet, or to print the total at. the foot of a column or sub-totals below sub-sections of a column without operating the computing device or its connections.

To 1he accumplishmentpi these objects and'others subordinate thereto, the preferred embodimentof the" Specification of Letters Patent.

App-mew and December 29,1906. Serial No. 350,002.

Patented July 2, 1907.

invention resides in that construction and arrangement of parts to be hereinafter described, illustrated in the accompanying drawings, and succinctly defined in the appended claims.

In said drawingsFigure 1 is.a sectional elevation of an Elliott-Fishor billing machine equipped in accordance with my invention. Fig. 2 is a rear elevation of so much of the same machine as is necessary to show the application of the invention thereto. Fig. 3 is a bottom plan view of the cover-plate of the machine carriage showing certain of the partsassembld'thereon. Fig. 4 is asection on the line of'Figl3. Fig. 5 is a section on the line 5 50i Fig; it. Fig. 6 is a detail view of the total key. Fig. is a detail view of the lower indicator plate. Fig, 8 is a perspective view of so much of the controlling-mechanism as is exterior to the carriage casing, the parts being shown in lulllines in operative position, and the inoperative positions thereof being indicated indotted lines. Fig. 9 is a view similar to Fig. 8, showing the parts in the positionsthey as-. sume when .the controlling mechanism is operated to effectan' operativeconnection between the computing device and the keys,- and Fig. 10 is a detail front elevation of a portionof the computing device, showing the controlling cam attached thereto.

Each part wherever shown is indicated by the same reference character.

In order to understand the controlling mechanism withv which this application is directly concerned, it is necessary to have a general understanding of the machine to which it is applied. The Elliott-Fisher billing machine, illustrated in a general way in Figs. land 2, is well known to commerce, and includes a fiat platen typewriter equipped withadding mechanism operated irom'the numeral keys of the typewriter to 'eifect the key levers 8 fulcrumed, within the casing 4. The key levers 8 are in turn connected through draw-wires 9 to the downwardly swinging type bars 10 carried by a type ring ll suspended from the casing. The carriage?! is moved to the right by suitable carriage propelling,

thereof to print a character.

The relation of the comgmt'ing device to the typewritt'ng ,rriaicht'ne. (See Patent No." 829,971 to Laganke and Smith.) In rear of the machine frame]. a guide bar 13 is supported by brackets 14. Supported on the bar 13 is a computing device or register I5 shiftablejalo-ngthe.

bar to it. in proper position relative to a column located at anypointof a work sheet supported by the platen, The register is retained in itssdjusted posi- 'tion by a locking device 16. The register 15 includes a casing which contains computing and registering mechanism, the specific character of which is immaterial, so

far as the present invention is concerned. It may be. explained, however, that it includes aseries of denominational 'members 17. in the form of digit carriersor number wheelsdesigned to register hundredths, tenths, units,te ns, hundreds, thousands, ten-thousands, hunordinarily of doublewidth to accommodate the decimal 7 space. Each of these wheels is' provided upon its pe riphery' with the digits .0 to 9 inclusive, one digit of each wheel being observable through a sight opening in the casing. Each digit carrier or number wheel 17 is arranged to make nine-tenths of a complete rotation, independently of the other wheels of the series, to pre sent its digits successively before the sight opening, and during its next or tenth increment of movement carries the next wheelto the left a single increment or step for the purpose of transferring the value accumulated upon one wheel to the wheel or member of next higher order.

' The wheels of the entire series being related to one an other in the manner stated, mechanical computations in addition may be effected by moving the wheels corresponding in order or denomination to the order of the digits composing the numbers to be added, a number of increments corresponding to the unitary values of such digits.

The master wheel and its operating connect-ions. The carriage 3 of the type-writing machine supports that portion of the computing mechanism which constitutes the operating means for the computing device or register, which, as already stated, is mounted on the machine frame. The primary element of the actuating mechanism is a master wheel '18 presentable to the num ber wheels of the register in succession by the step-by step advance of the carriage inthe-direction of letter i spac n T was: t t! s designed wheelsinproportion to the numerical values of f the fdigits embraced by, the computation and is oper-f 'ated by the numeral keys of th e typewriter, .as fully disf close'd the patent to Laganke and Smith, above i entified; a

The master wheel or actuator is finedly mounted on; v a comparatively long actuator shaft 19 and each key is" connected to the shaft by one oia series of-opersting connections esch oi which includes a ratchet wheel 20" Ifixed to the shaft and engaged by a drivirg pawl 21 carried by s arim um to em cups of umq'lwe'mamdfl. From thafh ntendotthe the links into or out of key stems. Adjacent to one end of the'carriage, the shaft 28 is provided with a notched arm 31 engaged by a pin 32 lever 24 depends a link 25 arrange'dto' swing from the lever and having a separable connection, as indicated at 26, with the stem of a numeral key. The several connections between the shaft 19 and the keys are identical, except that the connections between the crossed levers ofthe several are disposed in graduated arrangement in order; that the movement transmitted from a key to the master wheel'will be proper:

tionate to the value of thekey. The interlocking connections 26 between the links 25and the key stems are of such character that'when thlinks are swung rearwardly, as indicated indottedlines in Fig. 4, they will be disconnected the keys'so that the i latter may be operated tdprint upon any portion of the work sheet without causing the operltioii of the com puting device. Thus it illi-be seen that accordingly as the links 25-are in onepositioii or the other-[the numeral keys of thetypewriterwill'efiect the simul: taneous operation of the printing and computing mech-- anisms or the operati0n of: the f i iting 'mechanism' alone. A v

To effect the simultaneous shifting of the links 25 to V connect the computing mechanisniwith th-keys', 0r died-thousands, and millions, the tenths wheel being,

to disconnect the same therefrom,'a swinging yoke 27 is mounted within the casing "4 and comprises a rock shaft28 having radial arms 29 between the ends of which extend a bar 30 located within vertical slots 3] in the several links 25. Normally, the bar 30 acts as a guide for the links when the latter are rcciprocatcd by the keys 5 to operate the computing mechanisms By swinging the yoke,'the bar 30 may be made to move operative connection with the projecting laterally from a slide 33 extended through the covesplate '34 of the carriage casing and having secured to its upper side an upper. indicator plate 35 one end of which is turned up toform a total key 36, which may be moved by the operator to shiftthe slide 33 and thus swing the yoke 27 to the in Fig. 4 tor the purpose of disconnecting the keys from the computing mechanisnfin order that the keys may be operated to print the total at the foot of the column without operating the computing-device. i

"In order to indicate whether the keys are connected to the computing device for addition or are disconnect.- cd therefrom to permit the printing of the total, a lower indicator plate 37 is secured to the upper side (if the cover-plate 3-1 and is providcdwith indications, as for instance, the words total and add either of which is adapted to hcexposcd opposite a'sight opening 38 in the upper indicator plate-"35, accordinglyas the total 7 key is in onc 'position orthc other. This; when the parts are" inthe positions indicated Fig. 4, the word was will appear opposite the 81' t 38 while the word -'-add on the lower plate will be obscured by the upper plalte 35. When, on thc contrary, the total key is f shifted to swing the links 25 into connection with the key 'sternsto organizethe device for addition, the word add will appear opposite the sight opening, while the word tots will be obscured. By this arrangement, thc operator may tell at a glance whethcror not the machine is arranged to print and add or to print alone.

position indicated 'nected with formofa spiral spring connected at one end to the slide and at its opposite end to the cover-plate 34'. In thelpatent tola'gank'e and Smith, before mentioned, the entire mechanism thus far described isdisclosed, with the exception that the total key and;its manner of connection with. the yoke is specifically different and includes no 'indicator, except the total key itself. The present arrangement is also distinguishedrfrorn the patented construction the spring 39 which, instead of acting merelyasa detent, actually retracts the slide 33 and operates the 27 to disconnect the keys, unless this action of the spring is resisted in a positive manner.

The meansfor automatically connecting the keys with the operd ting connections ef the computing device at the proper point in the trc'welof. the carriage, and for outomalieally cliqconne tfng the 'Iceys when the printing point of the machine is beyond the column to be totalized. As-has :been stated in the 'prefatory part of this specification, the present invention coln'prehends the equipment of the machine with an improved mechanism whereby the normally disconnected li'eys will be automatically con the operating connections of the. comput ing device, wheneverthe movement of the typewriter carriage presents the printing mechanism opposite the column to be 'coinpnted, and whereby the connection thus established will be automatically broken as soon as the printing mechanism is disposed to print beyond the column or adding field. In the present embodiment of the invention, this mechanism includes a vertically disposed rock shaft 40 journaled in suitable bearings 41 secured to the casing 4 of the typewriter at or adjacent to the rear left hand'corner thereof, see Fig. 8.: The {shaft 40 is provided at its upper and lowerends with horizontal arms 42 and 43, the former extending over the top of the carriage casing and the latter extending rem'wardly b'eyond the same. At its free end the'arm .42 is provided-with a headed stud 14 resting within a slot 45 in the rear end of a connecting rod 46, the latter being connected at its front end to a stud 47 ertending from the plate 35 at a point directly abovethe slide 33. Normally, that is to say, when the keys arcdisconn'ect- 'ed and-the slide 33 is in its rearmost position, as shown in Fig. .8, the front end of the slot 45 is presented to the stud 44. *Therefore, ifthe arm'42 is swung forwardly, as shown in Fig. 9, it will urge the connecting rod 461011- gitudinally to advance the slide-33 and thus move the; links 25 into iionnection wit l 1 t he numeral keys against I the rosistanceopposed to such operation by the spring I 39 I If, on the contrary, the arm 42 is swung r'earwardly from the normal position, shown in Fig. 8, the stud 44 will move idl-yalong the slot 45 without effecting any movement of the total key or the parts connect-ed therewith. I I I Secured to the rearm'ost wall of the casingids a bracket 48 from which extends a stud 49 supporting a normally vertical lover. or trigger 50, extending above and below the stud and arranged to swing to either of I theseveral positions indicated in Figs- 8 andl): The

' lever 50 is normallyretained in its vertical position by a spring 51 wound around the stud 49 and having its ends disposed-vertically at'opposite sides of a pin 52 project ing from the lower extremity of the lever. It willthus bracket '48 and is interposed between the end portions of the spring just below the point at which said portions are crossed. The lower end' of the lever 50 is connected to the rear end of the arm 43 by a sectional connecting rod 54 between the sections of which is interposed a turn buckler 55 by means of which. the rod is rendered extensible to facilitate the assembling of the mechanism on the machine and to compensate for.w ear,=i f necessary.

It will appear, from what has been said, that if. the

lever 50 is swung from its normal position, indicated in Fig. 8, to the position shown in Fig. 9, the shaft 40 will be rocked in a'manner to cause the arm'42at the upper end thereof to shift the total key for the purpose of'connecting the operating connections of the computing-dd vice with'the'nur'neral keys, It will similarly appear that if the lever 50 is shifted from its normal pos'ition'to the position indicated in-dotted lines in Fig. 8, a reverse operation of the rock shaft 40 will be effected, but the total key will not be operated because the stud 44 will merely move idly in the slot 45 of the connecting rod 46.

The lever ;50 is one of the primary elements of the automatic control and is designed to be shifted at the proper time, as indicated in Fig 9-, to render the operation of the computing mechanism possible. This automatic operation of the lever is effected by the movement of the typewriter carriage 3 in .thedirection of letter spacing, which movement presents the upper end of the lever, preferably provided with inclined or printing point of the machine opposite the highest order of the column, and presents the master wheel'lS I in mesh with the denominational member or number wheel of highest order, the lever or'trigger 50 will be swung or canuned to the position shown in Fig. 9 by the trip or cam 57, and will be held in such position t'o'xnaintain the operative connection between the keys 5 and the master wheel 18 as long as said master wheel is oppo site the register, or in other words, aslong as the master wheel islocat'ed in its field of action, which is coincident .With' the series of denominational members or number wheels 17. I As soon, l1owover, =as the printing point of the machine moves out of or beyond the column thenunrlmr wheel oflowest'ordcr, the upper curl of the spring 39 to disconnect 'the keys so that the latter may be operated to print outside of the adding fieldwithout -being burdened by the computing. connections in other words, the arrangement is such that whenever, in the advance of the typewriter carriage, the numeral y 120. or adding field, and the master wheel lnovesbeyond- I work it is desirable to have the adding mechanism keys are depressed to printa digit outsideof'th'e column or adding field, said'keys will operate'entircly independently of both the computing device and the operating connections thereof, the keys being automatically connected with the operating connections of the computing device whenever the printing point is located within the adding field and disconnected when the The means for putting the automatic controlling mecham'sm out-of action. It will, be understood that machines of thecharacter under consideration are usedior' many different classes of work as for instance, letter writing, tabulating, listing, and billing: For .some classesof work the adding mechanism is a desirable adjunct, but'for others the unrestricted independent use of the typewriter is necessary. In still another class of brought into action to totalize a column extending part way down the sheet and to then have theoperation of the typewriter entirely independent of the 'adding mechanism so that matter may be written entirelyacross the sheet at a point below the column without operating the computing device, even in the event that digits are printed directly below the. column or in what would otherwise be the adding field. In order to meet these various requirements, I have combined'with the automatic key-connecting or controlling mechanism already described, a simple and convenient device whereby said controlling mechanism'may. be placed out of action so that the keys will not be connected with thecomputing device at any time. during the carriage travel even though digits are printed in what would otherwise be the addingfield To accomplish this purpose, it is merely necessary to move the lever to a a sition such; for instance, as that indicated in dotted lines, in Fig. 8, in which it will not contact with the cam 57. I therefore mount-a bracket 58 atone end'of the cover 59, which incloses the 'operating connections of thecomputing device. and fulcrumupon-said bracket a leverfil) extended upwardly through a slotted flange 6 and provided at its upper end with a finger-piece or key 62 by means of which the lever is swung. The lower end of the lever is pivotally connected to the front' extremity of a bar 63 provided at its rear extremity with a slot 64 for therece'ption of the stud 44.- Normall'ymh'e parts are so positioned that the stud 44 is disposed at some distance from the front end. of theslot 64 so that the rod 63 will in no w'ay'iut'erfere with the move'meut of the arm 42 when the controlling mechanism .is operated to effect the connection of the keys with the com- .piltliig device connections. When, however, it is deell to place the automatic controlling mechanism out of action, the lever 60 swung to the position indicated .in dotted lines in Fig. 8; This movement of the lever .will cause the har'll3 to move rearwardly into enguge' mom with the stud 44 and then urge the stud ,rearwardly for the purpose ofswingingthe arm 42 to'rock and allowing the lever 50 to return to normal position under the impulse of the spring 51.

Before concluding, attention may be directed to'the fact that theconnections between the typewriter keys and the computing device constitute key-operated mechanism controlling the operation of said computing device; that each of the links 25 is a member included in said mechanism and movable into and out of opers ative position; that the cam '57, the lever 56, and the elements cooperating with these parts to shift the links constitute means operated automatically by the movement of the carriage to control the position of a member of the key-operated mechanism; that the automatically operated means includes a device or abutment 44,- an d that the lever 60 and the arm 63 const-itule means for moving the device 44 and the lever 56 to illoperative positions torender the automatic controlling means ineffective. The automatic controlling means would be rendered equally ineffective, however, by the shifting of either the device 4401' the lever 56 alone to an inoperative position. i

It thought that from the foregoing, the construction and-operation of the described mechanism will be fully comprehended, but while the present embodiment. oi

the invention is thought at this time to be preferable, I

wish toreserve the right to effect such changes, modifications and variations thereof as may come fairly within the scope of the protection prayed.

'What I claim isz- 1. In a comblned typewritiug and calculating machine. the cumblnntlon' with a typewriter including a carriage. keys, and printing mechanism, .of a com'pm:ln; device, keyopel'ated mechanism controlling the operation of the ('Ol'llputlng device. suld meclmnism including a member movable into and out of operative position, moons opt-cared 'au-tomatlcally by the movement ofthe carriage to control the position of sald m'emben-suld means including a m'ov able element and a device intermediate of said element and the member, and means for moving sold device to on inoperative position independently of the kc vopernteil mechanism to render the autol'mltic controllingmoans ineffective. 1

2. ln a combined typewrlting and calculating machine. the combination with. a typewriter including a carriage. keys,'nnd printing mechanism, of a computing device, ken operated mec'lmnism'controlllng the operation of the com- .putlngdevice. said mechanism including a normally lnoperative member, means operated by the movement of the carriage to move skid member to'nu operative position, "said menus including a movable element and a. device 'whereby said element moves the normally iuo pcratlve member into operativeposltion, and menus for loving sllld device-to 'an inoperative position Independently of n k ys sm mechanism lion asretaining sis ass-s. m suclrnosltlon.

In a comblned typewritlng and calculating machine. the combination with a typewriter including aframe. a movable carriage. printing mechanlsmynnd keys, of a computing device. n key-operated actuator arranged rm operate'tlie"@omp1|tlug devlc'e, meanscontrolling the no eraflve connection between the actuator and the keys.

llll

'- erative moving one ofsaid elements to said means including two elements brought into engagement by the movement of the typewriter carriage and one of said elements being mounted to yield'when brought into engagementwith the other, vand means for moving thev yieidable element to an inoperative position to prevent the said elements, from being brought into contact by the movement of the carriage. I

4. In .a combined typewrlting and calculating machine, the combination with a typewriter including a frame, a

movabie carriage, printing mechanism movable with the carriage, and keys for operating the printing mechanism,

of a computing device mounted on the frame, an. actuator- -mounted on the carriage, and means controlling the operative connection between the actuator and the keys, said means including cooperating elements mounted on the frame and carriage respectively, and brought into enguge ment by the movement of the carriage, and means for for holding the same in such gagemeht of the elements. I

5. In a combined 'typewritilig and calculating machine, the'combination with a typewriter including a carriage,

posltion'to prevent the enan inoperative position and f keys,.' and printing mechanism, of a register, an actuator.

therefornormally disconnected from the keys, and means including a key for connecting the keys and actuator, an

actuator, and meanslncluding another key for rendering the automatic means inoperative.

, 6. In a combined typewriting and calculating machine, the combination with a typewriter including a carriage, printing mechanism, and keys,- of a register, an actuator therefor normally disconnected from the keys, means for connecting the actuator and keys, said means including a key adapted to be 'operated manually, and automatic means for operating the key at a predetermined point in the carriage movement.

7. In a combined typewriting and calculating machine, the combination with a typewriter including a carriage,

'printing mechanism, and keys, of a register, an actuator theretor normally disconnected from the keys, means for connectingthe actuator and keys, said means including a key "adapted to be operated manually, automatic means for operating the key at a predetermined point in the carriage movement, and means including a second key for rendering the automatic means inoperative.

8. The combination with a register, operating connec- 3 tions therefor, and keys, of means for controlling the operative relation between .the keys and said connections,

, said means including a slide having anopening therein and movable to different positions, and an indicator bearing a plurality of indications one only of which is visible through the opening in 'the slide in any given position of the latter.

9. The combination with a register, of operating mechanism therefor, and keys, of means including a slide opto control the cooperative relation between'the keys and the actuating mechanism, means operated automatically at a given point in the carriage movement to move the slide, means for operating the slide manually,

60 .und reactive means forv retracting the slide.

10. In a combined typewriting and calculating machine, the combination with a typewriter including,a carriage,

- keys, and printing mechanism, of a'register, an actuator therefor normally disconnected from the keys, means for effecting the automatic control of the connections between the keys and the actuator, said means including a lever movable with'the typewriter carriage and a relatively stationary: cam disposed to cooperate with the lever at a predetermined point in the carriage movement, and a key for shifting the lever to an'inoperatlve position 1 1.- In a combined typewrlting and calculating n'mchlne,

the combination with a typewriter including scurriagc,

keys, and printing mechanism, of a register, an actuator therefor normally disconnected.- from the keys, and means controlling the connection between the keys and the actuator, said means including a totalkey, a rock shaft connected to the key, a lever connected to the rock shaft,

and a cam disposed to movethe lever at a predetermined point in th carriage movement. 12. In a combined typewriting and calculating machine,

the combination with a typewriterincl udinga carriage. keys, and printing mechanism, of a register, an actuator therefor normally disconnected from the keys, and means tween the actuator and keys, a rock shaft having angularly related arms, a connection, between'one of the arms and the slide, a lever connected to the other arm, and means for. automatically operating the lever at a given point in the carriage movement.

13. In a combined typewriting and calculating machine, the combination with a typewriter including-a carriage, keys, and printing mechanism, of a register, anactuator therefor, means including a key operative to controltho connection between the actuator and the. keys, means for automatically operating the key, said means including a cam and a lever presented in cotiperative relation by the movement of the carriage, and a key {or moving the lever to an inoperative position. I

14. In a combined typewriting and calculating machine. the comblnation'with a typewriter including a carriage, keys, and printingmechanism, of a register, an actuator therefor, an element movable 'to control the cooperative relation between the keys and the actuator, automatic means brought into action at a predetermined point in the movement of the carriageto move said element, a key lever, and means operated by the key lever to move an element of the automatic mechanism to an inoperative position. I

the combination with a typewriter including a carriage. keys, and printing mechanism, or a register, an actuator therefor, means controlling the operative connection besiide, a swinging armIa connectin'g rod between the arm and the slide, means for automatically operating the arm at a predetermined point in the carriage movement to opcrate the slide, a key lever, and means operated by the lever to move the arm to an-inoperative position.

16. In a combined typewriting and calculating machine, the combination with a typewriter including a carriage, keys, and printing mechanism, of a registenan actuator therefor, means including a slide movable to control the connection between th'e keys and the actuator, a total key for manually operating the slide, a rock shaft provided wlth'angulariy related arms, aconnection; between one oi said arms and the slide, means including a cooperating cam and lever'foroperatlug the other arm of the rock shaft, a key lever, and means operated by the icey lever for shiftingthe rock shaft to, render the automatic mech: anism inoperative.

17. In a combined typewriting and calculating machine, the combination with a typewriter including a frame, a movable vcarriage, printing mechanism movable wlth the carriage, and keys for operating the printing mechanism, of a computing device mounted on the frame, an actuator mounted on the carriage, and means controlling the operative connection between the actuator and the keys, said through the opening in the slide the latter.

In testimony, that I claim the' foregoing as my own, I have hereto uflixed my signature in the presence of two witnesses;

JOHN 4. sm'rn.

Witnesses Jolun'r Zrnonsn,

P. H. Turns.-

including a slide controlling the operative relation be- 15. In a combined typewriting and calculating machine, I

tween the keys and the actuator, said means including a I means including cooperating elements mounted on the movable to different positions, and an indicator bearing a plurality of indications one only of which lS visible,

in any given position of 

